Finding the Fourth Proportional to 76,555.28, 105,643 and 42,563.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,555.28 : 105,643 = 42,563.72 : x
2. Step 2: Convert to fraction form
   76,555.28/105,643 = 42,563.72/x
3. Step 3: Cross multiply
   76,555.28x = 105,643 × 42,563.72
4. Step 4: Simplify right side
   76,555.28x = 4,496,559,071.96
5. Step 5: Solve for x
   x = 4,496,559,071.96/76,555.28
6. Step 6: Final answer
   x = 58,736.11